The Liquid Metal Slime (formerly Metal Babble, later Metabble due to display constraints) is a recurring monster in the Dragon Quest series. Introduced in Dragon Quest II, it is a metallic bubble slime that acts as a large source of experience points.

In terms of appearance, liquid metal slimes are essentially identical to bubble slimes, but are a slick silver in color and shine.

Liquid metal slimes have the standard qualities of metal monsters: high agility, high defense, immunity to essentially all forms of magic and skills, very low HP, very high experience payout, and the unfavorable habit of running away from battle frequently. Although a step up from the metal slime, the liquid metal slime is rarely shown to be competent at fighting, its only enhancements being its HP and the experience it gives when compared to metal slimes.

Liquid metal slimes appear within the vicinity of Rimuldar, among several within the dark world of Alefgard dungeons. A popular strategy for vanquishing the slime is to have your mage and priest cast Puff! and Accelerate on the first turn of the encounter, incinerating them automatically on the next turn.

Liquid metal slimes can be encountered shortly after the player obtains a ship. Though they remain an excellent source of experience points, they also have a habit of appearing alongside troublesome monsters such as hoodlums and hocus chimaeras. Exceptionally lucky and/or vigilant players may obtain a defeated liquid metal slime as an ally, one of the most potent monster partners that can be had in the game.

Liquid metal slimes can first be encountered in Trodain Castle, though their appearances there are very rare and only indicated by the hunter mechs in the area. They also appear in most places accessible by flight, most commonly at nighttime.

Liquid metal slimes appear as rank C members of the slime family and can be fought on Palaish Isle within Madame Rummy's Metal Menagerie. They can also be fought inside Tartarus, the final dungeon, before and after beating the game, though the player won't be able to see them on the overworld until after the game has been completed. Synthesizing two metal slimes together will result in a liquid metal slime.

The liquid metal slime is a Rank C monster in Dragon Quest Monsters: Joker 2. One can synthesized by mixing a meddle slime and a metal slime. Locations: Metal menagerie, Bemusoleum, Necropolis.